Add system level gauges for metrics

Author: ligangty

subsys/metrics/core/src/main/java/org/commonjava/indy/metrics/system/SystemGaugesSet.java

@@ -0,0 +1,72 @@
+/**
+ * Copyright (C) 2013~2019 Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.commonjava.indy.metrics.system;
+
+import com.codahale.metrics.Gauge;
+import com.codahale.metrics.Metric;
+import com.codahale.metrics.MetricSet;
+
+import java.lang.management.ManagementFactory;
+import java.lang.management.OperatingSystemMXBean;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * A set of gauges for system gauges, including stats on cpu, process, physical mem, swap mem.
+ */
+public class SystemGaugesSet
+        implements MetricSet
+{
+    private final OperatingSystemMXBean operatingSystemMXBean;
+
+    public SystemGaugesSet()
+    {
+        this( ManagementFactory.getOperatingSystemMXBean() );
+    }
+
+    public SystemGaugesSet( OperatingSystemMXBean mxBean )
+    {
+        this.operatingSystemMXBean = mxBean;
+    }
+
+    public Map<String, Metric> getMetrics()
+    {
+        if ( !( operatingSystemMXBean instanceof com.sun.management.OperatingSystemMXBean ) )
+        {
+            return Collections.emptyMap();
+        }
+
+        final com.sun.management.OperatingSystemMXBean osMxBean =
+                (com.sun.management.OperatingSystemMXBean) operatingSystemMXBean;
+
+        final Map<String, Metric> gauges = new HashMap<>();
+
+        gauges.put( "process.cpu.load", (Gauge<Double>) osMxBean::getProcessCpuLoad );
+        gauges.put( "system.cpu.load", (Gauge<Double>) osMxBean::getSystemCpuLoad );
+        gauges.put( "system.load.avg", (Gauge<Double>) osMxBean::getSystemLoadAverage );
+        gauges.put( "process.cpu.time.ms", (Gauge<Long>) () -> osMxBean.getProcessCpuTime() * 1000 );
+
+        gauges.put( "mem.total.swap", (Gauge<Long>) osMxBean::getTotalSwapSpaceSize );
+        gauges.put( "mem.total.physical", (Gauge<Long>) osMxBean::getTotalPhysicalMemorySize );
+        gauges.put( "mem.free.physical", (Gauge<Long>) osMxBean::getFreePhysicalMemorySize );
+        gauges.put( "mem.free.swap", (Gauge<Long>) osMxBean::getFreeSwapSpaceSize );
+
+        return Collections.unmodifiableMap( gauges );
+
+    }
+
+}

subsys/metrics/core/src/main/java/org/commonjava/indy/metrics/system/SystemInstrumentation.java

@@ -0,0 +1,31 @@
+/**
+ * Copyright (C) 2013~2019 Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *         http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.commonjava.indy.metrics.system;
+
+import com.codahale.metrics.MetricRegistry;
+
+import static com.codahale.metrics.MetricRegistry.name;
+
+public class SystemInstrumentation
+{
+    private static final String SYSTEM = "system";
+
+    public static void registerSystemMetric( String nodePrefix, MetricRegistry registry )
+    {
+        registry.register( name( nodePrefix, SYSTEM ), new SystemGaugesSet() );
+
+    }
+}

subsys/metrics/reporter/src/main/java/org/commonjava/indy/metrics/IndyMetricsManager.java

@@ -31,7 +31,6 @@
 
 import javax.annotation.PostConstruct;
 import javax.enterprise.context.ApplicationScoped;
-import javax.enterprise.inject.Any;
 import javax.enterprise.inject.Instance;
 import javax.enterprise.inject.Produces;
 import javax.inject.Inject;
@@ -47,6 +46,7 @@
 import static org.commonjava.indy.metrics.IndyMetricsConstants.SKIP_METRIC;
 import static org.commonjava.indy.metrics.IndyMetricsConstants.TIMER;
 import static org.commonjava.indy.metrics.jvm.IndyJVMInstrumentation.registerJvmMetric;
+import static org.commonjava.indy.metrics.system.SystemInstrumentation.registerSystemMetric;
 import static org.commonjava.indy.model.core.StoreType.remote;
 import static org.commonjava.indy.pkg.maven.model.MavenPackageTypeDescriptor.MAVEN_PKG_KEY;
 
@@ -99,6 +99,7 @@ public void init()
 
         logger.info( "Init metrics subsystem..." );
 
+        registerSystemMetric( config.getNodePrefix(), metricRegistry );
         registerJvmMetric( config.getNodePrefix(), metricRegistry );
 
         // Health checks